{"type":"firestarter.listing","listing":{"id":"lst_SXzzk8mG","product_name":"Ring sizer","category":"Ring","description":"The ring that you will wear for a lifetime must fit perfectly! Do you want to order one of our rings but you don't know your ring size? No stress! We made it very easy for you. This ring sizer will flip your cold feet into a gold rush!\n*If you order a ring from us based on your ring sizer, you will receive the ring sizer as a gift, and get a full refund on this product. :) The ring sizer comes with instructions.","images":["https://cdn.shopify.com/s/files/1/0272/0799/1414/products/ring-sizer-537839.jpg?v=1742986528","https://cdn.shopify.com/s/files/1/0272/0799/1414/products/ring-sizer-503287.jpg?v=1742986529","https://cdn.shopify.com/s/files/1/0272/0799/1414/products/ring-sizer-930720.jpg?v=1742986530"],"price":3.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:45:34.710Z"},"share_url":"https://firestarter.network/l/lst_SXzzk8mG","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_SXzzk8mG' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Ring sizer' and a budget_max comfortably above $3.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}